Jacksonville Harbor Maintenance Dredging, 2017

Cashman was contracted by USACE, Jacksonville District to perform maintenance dredging at various locations along the St. Johns River, from Bar Cut‐3 through Cut‐9, to a depth of 40 feet plus an allowable 2‐foot over depth. Material resulting from this work was offloaded and placed upland into Cell A of Buck Island, ~12 miles away from the dredge site. 


  • Over 300,000 cubic yards of shoal material was removed from the St. Johns River utilizing the trailing suction hopper dredge, Atchafalaya. 
  • The Atchafalaya transferred material from its onboard hopper through the self-emptying pump out system to a booster barge. The booster pump made the final material push to Buck Island for placement. 
  • Incidental work includes endangered species and turbidity monitoring. 
  • The project was successfully completed on time with zero safety incidents. 
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USACE - Jacksonville District
January 2017 - April 2017